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<p class="MsoNormal">Thank you Julien and Thibaut. These are very useful information.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">For Gemini TF, the angle seems to be -83.5 (manually tuned and checked visually), but there is translation for all x,y and z axis. I tried to use nbZshift and Zshift to compensate the axial translation (z), but could not fix translation
on x,y plane. Any suggestion?<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Regards,<o:p></o:p></p>
<p class="MsoNormal">Shenpeng<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><b><span lang="EN-US">From:</span></b><span lang="EN-US"> Julien Salvadori <j.salvadori89@gmail.com>
<br>
<b>Sent:</b> Tuesday, 20 October 2020 6:21 PM<br>
<b>To:</b> Li, Shenpeng (H&B, Parkville) <Shenpeng.Li@csiro.au><br>
<b>Cc:</b> castor-users@lists.castor-project.org<br>
<b>Subject:</b> Re: [Castor-users] Problem of data conversion for Phillips Gemini TF 64<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Dear Li,<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt">For the Vereos PET scanner, the detection elements are arranged transversely in the CCW direction and the angular position of the first module with respect to the y-axis is - 80° (see figure).<o:p></o:p></p>
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<p class="MsoNormal"><br>
If the convention is the same for the Ingenuity, you can try :<br>
rotation direction: CCW<br>
rsectors first angle : -80°.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Hope this helps, <o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Julien Salvadori <o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Le mar. 20 oct. 2020 à 01:55, Li, Shenpeng (H&B, Parkville) <<a href="mailto:Shenpeng.Li@csiro.au">Shenpeng.Li@csiro.au</a>> a écrit :<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Dear Castor users,<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">I am trying to convert the raw PET data (list-mode) from Phillips Gemini TF 64 to Castor format. Currently, I can read the pair of crystal indexes (transvers and axial) from Gemini
data, and then use them to generate the crystal IDs to the corresponding events. I converted the PET data to the Castor formats (both list-mode and histogram) by using the crystal IDs from Gemini. However, I found the orientation difference between castor
reconstruction and PET console reconstruction. I have tried to change the “resections first angle” in the geom file to match the rotation, but the castor image is still flipped (left-right and superior-inferior). I am not sure whether this image flip is related
to the indexation direction (eg. clock-wise v.s. counter clock-wise) between castor and Gemini. The mismatch orientation between then castor image and CT attenuation map (in Gemini orientation ) makes attenuation correction difficult.
<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Does anyone know the details of Gemini’s crystal indexation? So, I can convert the crystals IDs to the castor indexation. Or, is it possible to derive the sinogram of attenuation
file from scanner (similar to Siemens machines by using e7tools)? or What other options to solve this issue.<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">I appreciate your help.<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Best Regards,<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;vertical-align:baseline">
<b><span style="font-size:12.0pt;color:black">Shenpeng Li, PhD.</span></b><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;vertical-align:baseline">
<span style="font-size:10.0pt;font-family:inherit;color:#201F1E;border:none windowtext 1.0pt;padding:0cm">CERC Postdoctoral Fellow</span><o:p></o:p></p>
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<span style="font-size:12.0pt;font-family:"Segoe UI",sans-serif;color:#323130"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;vertical-align:baseline">
<b><span style="font-size:10.0pt;font-family:inherit;color:#323130;border:none windowtext 1.0pt;padding:0cm">Health and Biosecurity, The Australian e-Health Research Centre, CSIRO</span></b><o:p></o:p></p>
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<span style="font-size:10.0pt;font-family:inherit;color:#323130;border:none windowtext 1.0pt;padding:0cm">343 Royal Parade, Parkville, Victoria 3052, Australia</span><o:p></o:p></p>
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<span style="font-size:12.0pt;font-family:"Segoe UI",sans-serif;color:#323130"> </span><o:p></o:p></p>
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<b><span style="font-size:10.0pt;font-family:inherit;color:#323130;border:none windowtext 1.0pt;padding:0cm">Dept of Nuclear Medicine and Centre for PET, Austin Hospital</span></b><o:p></o:p></p>
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<span style="font-size:10.0pt;font-family:inherit;color:#323130;border:none windowtext 1.0pt;padding:0cm">LVL1 Harrold STOKES Block, 145 Studley Road, Heidelberg, Victoria <span style="background:white">3084,</span> Australia</span><o:p></o:p></p>
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